The Shark brand saws are pretty good saws and run about $30-35C up here. Some have replaceable blades. They can be sharpened with a file that Lee Valley sells. I've sharpened mine a few times. It's time consuming and I've never gotten back to factory sharp but I was able to make a noticeable improvement. Once you used a good pull saw you'll never use the old style again. I've been using them for 20-25 years now. My old Nicholson is rusty from lack of use, hanging on a pegboard hook.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.